var base64EncodeChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789 /";
		var base64DecodeChars = new Array(
		-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
		-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
		-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63,
		52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1,
		-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
		15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1,
		-1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
		41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1);
		
		function base64encode(str) {
		var out, i, len;
		var c1, c2, c3;
		
		len = str.length;
		i = 0;
		out = "";
		while(i < len) {
		c1 = str.charCodeAt(i ) & 0xff;
		if(i == len)
		{
		out = base64EncodeChars.charAt(c1 >> 2);
		out = base64EncodeChars.charAt((c1 & 0x3) << 4);
		out = "==";
		break;
		}
		c2 = str.charCodeAt(i );
		if(i == len)
		{
		out = base64EncodeChars.charAt(c1 >> 2);
		out = base64EncodeChars.charAt(((c1 & 0x3)<< 4) | ((c2 & 0xF0) >> 4));
		out = base64EncodeChars.charAt((c2 & 0xF) << 2);
		out = "=";
		break;
		}
		c3 = str.charCodeAt(i );
		out = base64EncodeChars.charAt(c1 >> 2);
		out = base64EncodeChars.charAt(((c1 & 0x3)<< 4) | ((c2 & 0xF0) >> 4));
		out = base64EncodeChars.charAt(((c2 & 0xF) << 2) | ((c3 & 0xC0) >>6));
		out = base64EncodeChars.charAt(c3 & 0x3F);
		}
		return out;
		}
		
		function base64decode(str) {
		var c1, c2, c3, c4;
		var i, len, out;
		
		len = str.length;
		i = 0;
		out = "";
		while(i < len) {
		/* c1 */
		do {
		c1 = base64DecodeChars[str.charCodeAt(i ) & 0xff];
		} while(i < len && c1 == -1);
		if(c1 == -1)
		break;
		
		/* c2 */
		do {
		c2 = base64DecodeChars[str.charCodeAt(i ) & 0xff];
		} while(i < len && c2 == -1);
		if(c2 == -1)
		break;
		
		out = String.fromCharCode((c1 << 2) | ((c2 & 0x30) >> 4));
		
		/* c3 */
		do {
		c3 = str.charCodeAt(i ) & 0xff;
		if(c3 == 61)
		return out;
		c3 = base64DecodeChars[c3];
		} while(i < len && c3 == -1);
		if(c3 == -1)
		break;
		
		out = String.fromCharCode(((c2 & 0XF) << 4) | ((c3 & 0x3C) >> 2));
		
		/* c4 */
		do {
		c4 = str.charCodeAt(i ) & 0xff;
		if(c4 == 61)
		return out;
		c4 = base64DecodeChars[c4];
		} while(i < len && c4 == -1);
		if(c4 == -1)
		break;
		out = String.fromCharCode(((c3 & 0x03) << 6) | c4);
		}
		return out;
		}
      function utf16to8(str) {
		var out, i, len, c;
		out = "";
		len = str.length;
		for(i = 0; i < len; i++) {
		c = str.charCodeAt(i);
		if ((c >= 0x0001) && (c <= 0x007F)) {
		out += str.charAt(i);
		} else if (c > 0x07FF) {
		out += String.fromCharCode(0xE0 | ((c >> 12) & 0x0F));
		out += String.fromCharCode(0x80 | ((c >> 6) & 0x3F));
		out += String.fromCharCode(0x80 | ((c >> 0) & 0x3F));
		} else {
		out += String.fromCharCode(0xC0 | ((c >> 6) & 0x1F));
		out += String.fromCharCode(0x80 | ((c >> 0) & 0x3F));
		}
		}
		return out;
		}